S. M. Yu

Infant mortality in the United States: trends, differentials, and projections, 1950 through 2010.

G. Singh, G K Singh, S M Yu, 1995, American journal of public health.

Preconceptional and prenatal multivitamin-mineral supplement use in the 1988 National Maternal and Infant Health Survey.

G. Singh, S. M. Yu, W. Kessel, 1996, American journal of public health.